A Highly Efficient Enantioselective Synthesis of 2-Methyl Chromans via Four Sequential Palladium-Catalyzed Reactions.

ChemInform ◽  
2005 ◽  
Vol 36 (22) ◽  
Author(s):  
Michael Palucki ◽  
Nobuyoshi Yasuda
2009 ◽  
Vol 62 (1) ◽  
pp. 27 ◽  
Author(s):  
Vaibhav P. Mehta ◽  
Sachin G. Modha ◽  
Denis Ermolat'ev ◽  
Kristof Van Hecke ◽  
Luc Van Meervelt ◽  
...  

A highly efficient method for the synthesis of diversely substituted furo[2,3-b]pyrazines has been elaborated. The Ag+- or iodine-mediated electrophilic cyclization of readily generated 5-chloro-3-substituted ethynyl-1-(4-methoxybenzyl)-pyrazin-2(1H)-ones affords substituted furo[2,3-b]pyrazines, which undergo various palladium catalyzed reactions to generate a library of difficult to attain diversely substituted furo[2,3-b]pyrazines.


2019 ◽  
Vol 23 (11) ◽  
pp. 1168-1213 ◽  
Author(s):  
Samar Noreen ◽  
Ameer Fawad Zahoor ◽  
Sajjad Ahmad ◽  
Irum Shahzadi ◽  
Ali Irfan ◽  
...  

Background: Asymmetric catalysis holds a prestigious role in organic syntheses since a long time and chiral inductors such as ligands have been used to achieve the utmost desired results at this pitch. The asymmetric version of Tsuji-Trost allylation has played a crucial role in enantioselective synthesis. Various chiral ligands have been known for Pdcatalyzed Asymmetric Allylic Alkylation (AAA) reactions and exhibited excellent catalytic potential. The use of chiral ligands as asymmetric inductors has widened the scope of Tsuji-Trost allylic alkylation reactions. Conclusion: Therefore, in this review article, a variety of chiral inductors or ligands have been focused for palladium catalyzed asymmetric allylic alkylation (Tsuji-Trost allylation) and in this regard, recently reported literature (2013-2017) has been described. The use of ligands causes the induction of enantiodiscrimination to the allylated products, therefore, the syntheses of various kinds of ligands have been targeted by many research groups to employ in Pd-catalyzed AAA reactions.


2013 ◽  
Vol 53 (5) ◽  
pp. 1420-1424 ◽  
Author(s):  
Lin He ◽  
Haoquan Li ◽  
Helfried Neumann ◽  
Matthias Beller ◽  
Xiao-Feng Wu

Author(s):  
Ruixia Liu ◽  
Jingkuo Han ◽  
Bin Li ◽  
Xian Liu ◽  
Zhao Wei ◽  
...  

A highly efficient intramolecular asymmetric reductive amination transformation catalyzed by an iridium complex of tBu-ax-Josiphos has been realized, providing an efficient access to various THIQ alkaloids.


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